Why it is Necessary---Children/pets open the window and are prone to falling from the building. Open the closet and make a mess. To prevent children from pinching their fingers. Multiple Scenes---Additional heightening accessories, suitable for most sliding windows, closets or wardrobe doors on the market. Automatic locking--- Two-way automatic locking, which not only prevents children from falling down the building when opening the window, but also prevents fingers from being caught by closing the window. Multi Pack--- 3 Pcs sliding window locks can be installed in multiple places. The design is not eye-catching, silently guarding the baby. Quick Installation---Installation with clear acrylic tape requires no additional tools.Can withstand the pull of 66 lb. Acrylic tape leaves no traces when you remove window locks.